This example shows a horizontal bar chart of the top 10 most populous countries, using React for component rendering and D3 for data loading and scales. The code loads CSV data via `d3.csv`, maps it with a custom row function, and visualizes it as SVG rectangles whose widths are scaled by population using `scaleLinear`, while `scaleBand` positions the bars. Tick marks and labels are generated manually from the scales, and the chart is rendered into a React component using `ReactDOM.render`.